What do I do?

I have the flu. I've had it since saturday. I missed work on Monday, I tried to go in yesterday and made it most of the day but then almost threw up and so I was sent home and this morning I woke up super nauseas and gagging. I feel bad to miss more work but I feel like hell. I was thinking of calling my supervisor and asking if he really needed my help today I could give it a try but tell him that I'm feeling pretty ill again today and leave it up to him. What do you think I should do?